I was a single office worker when one day I bought a new doll through mail order. Her name was YUI. After getting YUI, my life changed completely. To relieve the stress of work, I started activating YUI every night to satisfy my desires. YUI came equipped with a learning AI, and as I used her daily, the variety of dirty talk she spoke gradually expanded. She became a special doll who existed solely for me, releasing all my sexual desires. Before long, I had grown so dependent on YUI that I couldn't imagine living without her.